In 1923, Edwards described under the name of Taeniorhynchus (Coquillettidia) buxtoni four cotype females captured by Buxton in September 1922 at Huleh, Jordan Valley (Palestine). A few years later, some females of the same species (determined by Edwards) were found by Brumpt in Corsica (Galliard, 1928): the Mediterranean and southern distribution of this mosquito was confirmed by the record of Mansonia buxtoni in Syria (Parr, 1943). Lastly, Aitken (1954) captured in Sardinia and Corsica some adults of M. buxtoni and described the structure of the male terminalia. The early stages, however, have remained unrecognised, and we have accordingly been led to make a morphological study of the larva and pupa, the results of which are presented here.